Eevee Render is brighter than 3d viewport display
Your scene seems to be all properly set (same sampling, no Simplify, no hidden objects etc), so the &quot;issue&quot; seems to be with Blender, not with you overlooking some settings. In other words, you probably have to live with it for now.
Just to be sure there weren't any hidden settings or objects in your scene that were interfering, I was also able to reproduce the behaviour with a entirely new scene (although in my case the render seems dimmer).
It looks like the feature that originates the difference is Eevee's &quot;Bloom&quot;. Without Bloom, the world color matches perfectly.
I'm not sure whether this is a bug or one of the unavoidable differences between &quot;Render&quot; and &quot;Rendered Viewport&quot; (like, for example, anything that has to do with the concept of screen space), and therefore if it should be reported to the developers or not.

I've also checked whether you're affected by a known bug of Blender 2.83 with viewport color management: https://developer.blender.org/T77909, but even with Blender 2.82 (unaffected by the bug) your scene seems to suffer a mismatch.